Driving mechanism for clinker grinders



D. K., BEACH ET AL .DRIVING MEGHANISM FOR CLINKER GRINDEHS Filed June l2, 1922 j; i "F: [y [6 J Bremse 4 A ATTORNEY.

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Patented Dec. Z7, 1927.

TAYLOR, DF WORCESTER, MASSACHUSETTS, .AS-

DAVID K. BEACH AND IRVING A.

SIGNORS TO RILEY STOKEB. CORPORATION, .A GORFORATLKON OF MASSACHUSETTS.

DRIVING MECHANISM FOR CLINIKER` GRNDERS.

Application filed June 12, 1922. Serial No. 567,600.

This invention relates to driving mechav nism for a` clinler grinder in a furnace and particularly a mechanism for automatically controlling the period of movement thereof.

In the operation of furnaces lia/ving.meu chanical stolrers equipped with clinlrer grinders, it is commonly desirable torotate the grinder mechanism periodically to an extent sufficient to remove the surplus ashes but not sutlicient to uncover the grinding roll or rolls and expose them to the heat of the furnace.

It is the object of our invention to provide driving mechanism having a period of movement which may be selectively determined and by which the roll will he given a definite angular movement, after which it will remainY at rest until again placed in operation by the use of a manual starting de vice. v i

l/Vith this general object in view, important features of our invention relate to improved ratchet driving mechanism for a clinker grinder, to devices for selectively determining the period of movement thereof, todevices for manually controlling the startingof the mechanism, and to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of our invention is shown in the drawings in which:

Fig. 1 is an end elevation of our improved driving mechanism, with certain parts broken away to disclose other parts;

Fig.`2 is a side elevation of the parts shown in Fig. l; y i

Fig. 3 isa sectional plan view taken along i the line .fl-W3 in Fig. 1; and

Fig. 4 is a sectional bottom view alongz the line 4-4 in Fig', 1.

Referring1 to the drawings, we have shown af portion of a side wall of a :turnace and also of the door 11 of` the furnace room. A elinlrer grinder `roll 12 having grinding teeth or projections 12l is mounted in the usual. bearings 13, one of which is shown in Fig.` 2. rlihe parts of the furnace and stolrer are commonly so disposed that the grinder roll below the level of the licor, although this location is not essential.

Forthe purposes of rotating the roll 12, we secure a ratchet wheel 14; thereto `in any convenient manner as by bolts 15. A second ratchet wheel 16 is mounted t0 rotate freely upon the hub of the ratchet 111 and a sprocket taken wheel 17 is lreyed or otherwise secured to the hub of the loose ratchet wheel. 1G. A pair of ratchet pawls 1S and 19 are provided for the ratchet wheels `let and 1G, said pawls being preferably mounted upon a bolt 20 supported in a swinging frame 2l. 'llhe frame 2l is formed of side plates 22 and 23 freely mov able about the airis of the roll 12 and secured in spaced relation by bolts 24; and bushings 25. A. link 2G connects the swinging frame 2l. to any suitable reciprocating element of lthe stolrer n'iechanisin, such as the coal feeding ram or the reciprocating' retortside walls.

A chain 27 cormects the sprocket wheel 17 to a secondeprocltet wheel 28 mounted upon a bearingl 29 fixed to the furnace wall 10. The sprocket wheel 2S is provided with a handle 3G by which it may be manually rotatcd.

A shield 31 (Fig. il.) is provided for the pawl 19 and a similar shield 32 (Fig. 2) is provided for the pawl 18. These shields are mounted on blocks or plates 33 and 34 which are provided with segmental slots` through which extend bolts 35 which guide the plates and shields for movement about the axis of the roll 12. The shield plates 33 and 3ft are pivoted to linlrs or controlling devices 36 and 37 which extend upward through the floor 11 und through a slotted hase plate 38. Each linlt is provided with a handle at its upper end and also with a plurality of holes extending therethrough and positioned to receive a pin or stud 39A 'in the base plate 38. Fry rcn'ioving the pin, the links 3G and 37 may be adjusted vertically as desired and the shields 51 and 32 may thus be held in any desired position relative to the pawls 1S and 19.

rlhe number of teeth in the ratchet wheels 141 and 16 may be varied to suit different operating conditions. As shown herein, the wheel 1.4L is provided. withv a relatively small number of large teeth spaced widely apart while 'the ratchctwl'ieel 1G has a much larger `number of siiialler teeth. The Wheel. 16 also has a blunt: portion 4.0 which is preferably o-lgreater thickness than the toothed portion of lthe wheel, thus providing a. shoulder (Fi et) adapted to pass under and engage a l 4:1 on the side of the pawl 18.

Having described the details of construe tion oi our improved driving mechanism, the operation thereof. is as follows:

',lhe shields 31 and 32 are first set to perteeth and a blank I19 will engage theuncut The parts,

Init the desired advance movement of each Wheel at each feeding motion of the pawls 18 and 19, caused by the oscillation of the swingingframe 21. F or the purposes of illustration, it may be assumed that the freely rotatingV ratchet Wheel 16 has fifty ratchet portion equal to ten teeth, while the ratchet Wheel 14 fixed to the roll 12 has fifteen teeth. le may also assume that the shields are arranged so that the paal 19 Will'ffeed the ratchet wheel 16 tivo teeth for each oscillation and thatrthe pawl 1S will feed the ratchet Wheel let one tooth. vrlhe ratchet Wheel 14 and the roll 12 will thus be angularly advanced twice as fast as the ratchet Wheel 16. After the Wheel 16 has been advanced somewhat less than a full revolution, the' portion l() thereof Will engage and lift 'the pawl 1S and thus stop the feed of the wheel 14 and the roll 12. At approximately the same time the feed pavvl surface of the Wheel portion 40, thus prevent-ing further movement of, either ratchet wheel after the elinker grinder roll has made approximately one and threequarters. revolutions.

lBy changing the number of teeth in t-he ratchetl Wheels or the number of teeth fed at each stroke, the number of revolutions may be Widely varied,so that the roll 12 may be stopped after several revolutions or after a fraction ofv a revolution, as may be desired. .when once stopped, will remain at rest until the operator rotates the ratchet Wheel l16 by means of the handle 30 and chain 27 ,to remove the portion 40 from enga-gement With the feed pawls, thus permitv.tion and he can then ting v.further advance movement of the ratchet Wheels.

Several important advantages arise from the use of our'improved driving and controlling mechanism. It is impossible With thismechanism for an operator to leave the grinding roll rotating-for an indefinite period, removing all of the ashes and exposing the roll to the heat of the furnace by which it Would be quickly distorted and ruined. Furthermore, Lthe time of the operator is saved, as it' ism'erely necessary for him to start the elinker grinder in operago about other Work, knowing .that'the grinder roll will come to rest afterthe .desired activity. The device is also readily adjustable to different conditions of furnace operation, as the period of rotation of the roll may be varied Within Wide Y limits.

- Havingthus ldescribed our invention and the advantages thereof, ive do not wish to be limited to the details herein disclosed otherwisethan as set forth in the claims, but what We claim is A 1. In a furnace, a elinker grinder roll,

means for rotating said roll, means to stop the` roll after a predetermined movement thereof, and means to vary both the rate and extent of said movement.

2. In a furnace, a elinker grinder roll and driving mechanism therefor, said means including a ratchet Wheel connected to said roll, actuating means to give said wheel a limited angular` movement of predetermined extent, means to render the driving mechanism inoperative at the completion of such predetermined movement and manual means to render said driving mechanism again operative. 3. Ina furnace, a elinker grinder roll and driving mechanism therefor, said means including a ratchet Wheel connected to said roll, means to give said wheel a limited angular movement of predetermined extent, and means to vary the extent of said movement.

4. In a furnace, a elinker grinder roll and drivingr mechanism therefor, said means including a ratchet wheel connected to said roll, means to give said wheel a limited angular movement of predetermined extent, and means to vary the rate and extent of said movement.

' 5. In a furnace, a elinker grinder roll, driving mechanism therefor including a ratchet Wheel connected to said roll, means to rotate said ratchet wheel and roll, automatic means to render said rotating means inoperative after a. limited angular movement of predetermined extent, means to vary the limit of such movement, and manual means to render said driving mechanism again operative.

6. In a furnace, a elinker grinder roll, driving means therefor including a ratchet Wheel fixed to said roll, stopping means therefor including a second ratchet wheel loosely mounted on said roll, separate feed pawls for said ratchet Wheels, and separate means to adjust the effective stroke of each pawl.

7. In a furnace, a elinker grinder roll, driving means therefor including a ratchet wheel fixed to said roll, stopping means therefor including a second ratchet wheel loosely mounted on said roll, and having teeth on a. portion only of its periphery, separate feed pawls for said wheels, and means on the second ratchet Wheel effective in a certain position thereof to render inoperative the feed pawl for the ratchet wheel fixed to the grinder roll.

8. In a furnace, a elinker grinder roll, driving means therefor including a ratchet Wheel fixed to said roll, stopping means therefor including a second ratchet wheel loosely mounted on said roll, separate feed pawls for said ratchet Wheels, a shield for each pa-Wl, and manual means to adjust said shields.

9. In a furnace, a elinker grinder roll, driving means therefor including a ratchet l tl Wheel fixed to said roll, stopping means therefor including a second ratchet Wheel loosely mounted on said roll, separate feed pawls for said ratchet Wheels, a shield for each pavvl, and manual means to adjust said shields, said shields having segmental slots concentric with said roll and being slidable upon supporting devices extending through said slots.

l0. In a furnace, a clinker grinder roll, means to rotate said roll, a limit device effestive to disable said rotating means after `a predetermined rotation of said roll efective to remove the surplus ashes While said roll remains covered, and means to manuall7 and selectively adjust said limit device to vary the extent of rota-tion of said roll and t0 adapt the amountof rotation to meet the operative load conditions.

In testimony whereof We have hereunto 20 aiXed our signatures.

DAVID K. BEACH. e IRVING A. TAYLOR. 

